204167985 has 16 divisors (see below), whose sum is σ = 373335936. Its totient is φ = 93333888.

The previous prime is 204167983. The next prime is 204167993. The reversal of 204167985 is 589761402.

204167985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204167985 - 2¹ = 204167983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204167983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972124 + ... + 972333.

It is an arithmetic number, because the mean of its divisors is an integer number (23333496).

Almost surely, 2^204167985 is an apocalyptic number.

It is an amenable number.

204167985 is a deficient number, since it is larger than the sum of its proper divisors (169167951).

204167985 is a wasteful number, since it uses less digits than its factorization.

204167985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944472.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 204167985 is about 14288.7362982176. The cubic root of 204167985 is about 588.8380704074.

The spelling of 204167985 in words is "two hundred four million, one hundred sixty-seven thousand, nine hundred eighty-five".